JP6914498B2 - Vertical sealing device in vertical bag filling and packaging machine - Google Patents

Description

In the present invention, in the vertical bag-making filling and packaging machine, in order to mold the strip-shaped packaging material into a tubular packaging material, a vertical seal is provided on the side edge portion of the strip-shaped packaging material while moving in the feeding direction of the strip-shaped packaging material. The present invention relates to a vertical sealing device including a vertical sealing member to be applied.

Conventionally, as a bag-making filling / packaging machine, a vertical bag-making filling / packaging machine as shown as an example as a schematic perspective view in FIG. 5 is often used. In the vertical bag-making filling machine 50, the strip-shaped packaging material 60 is bent into a substantially tubular shape by the former 51 and traveled in the vertical direction (feeding direction of the packaging material) in the vertical direction by the vertical sealing device 52. A seal (vertical seal Sc) is applied and the tubular packaging material 61 is formed. The product S, which is a package, is put into the tubular packaging material 61 through the filling cylinder 53. A bag formed in advance and in which the product S is packaged by the horizontal seal / cutting device 54 applying the horizontal seal Se to the tubular packaging material 61 in the lateral direction (direction intersecting the feeding direction of the packaging material). At the same time that the package 63 is manufactured, a bag 62 into which the product S is put next is formed. On the left and right sides of the outer periphery of the filling cylinder 53, a packaging material feed belt mechanism 55 (showing only the belt mechanism on one side) that feeds by sandwiching the tubular packaging material 61 is arranged.

The strip-shaped packaging material 60 is bent by the former 51 so that the both side edge portions fe and fe are overlapped in a palm-like shape, and the vertical sealing device 52 applies the vertical sealing Sc to both side edge portions fe and fe. It is formed on the tubular packaging material 61. The bag packaging body 63 is manufactured by putting the product S into the tubular packaging material 61 and performing the horizontal sealing in the transverse direction by the horizontal sealing / cutting device 54. The seal cut blocks 54a and 54b constituting the horizontal seal / cut device 54 are members that operate to approach and separate from each other with respect to the tubular packaging material 61, respectively, and cross the tubular packaging material 61 when approaching. The upper horizontal sealer portion that forms the bottom side horizontal seal (a part of the horizontal seal Se) for the bag 62 and the top side horizontal seal (the rest of the horizontal seal Se) of the bag package 63 are sandwiched in the direction. It has a lower lateral sealer portion that forms a.

The horizontal seal / cutting device 54 further includes a cutter blade 56 that cuts through the tubular packaging material 61. The cutter blade 56 is attached to one of the seal cut blocks 54a between the upper and lower lateral sealers, and both seal cut blocks 54a and 54b are mutually attached to the other seal cut block 54b. A groove 57 is formed in which the cutter blade 56 enters when approaching. When both seal cut blocks 54a and 54b approach each other, the upper and lower horizontal seal portions sandwich the packaging material to weld the tubular packaging material 61 to form the horizontal seal Se, and at the same time, the cutter blade 56 has a tubular shape. It breaks through the packaging material 61 and cuts it. At the lower end of the filling cylinder 53, a pair of tension guides 59, 59 for tensioning the tubular packaging material 61 on both outer sides in the radial direction are provided so as to extend diagonally downward.

In this type of conventional vertical bag-making filling and packaging machine, the packaging material is intermittently fed according to the packaging operation. That is, the vertical sealing device 52 sandwiches the both side edge portions fe, fe during a short period of time when the strip-shaped packaging material 60 and the curved packaging material in which the both side edge portions fe, fe are brought close to each other are stopped. In addition to applying the vertical seal Sc to the portion, the horizontal seal / cutting device 54 applies the horizontal seal Se to manufacture the bag packaging body 63. The vertical and horizontal sealing is performed by heat sealing, and in the case of such heat sealing, in the case of excessive speed, the film feed is slowed down to secure the sealing time. In such a type of packaging machine that intermittently feeds the packaging material, there is a limit to the packaging speed because it is necessary to temporarily stop the feeding of the packaging material 60.

In a bag-making filling and packaging machine that continuously feeds packaging materials, the heat roller method, which is often used in horizontal packaging machines, may be used as the vertical sealing device, but when the speed drops when the machine is stopped. Or when the speed is increased at the start of machine operation, the same part of the packaging material will be heated for a relatively long period of time, which may result in poor sealing condition. The same applies when the feeding of the packaging material is stopped while waiting for the product due to the interruption of the supply of the product to be packaged. In the vertical packaging machine, since the product is supplied by free fall, the speed of the packaging material may change in one cycle, which is also one of the causes of the deterioration of the sealing condition.

It is known that a vertical sealing device is configured in a box motion structure as a packaging device in which a packaging material is formed into a tubular shape by a former and heat-welding the edge portions on both sides thereof in a palm-shaped manner (see Patent Document 1). That is, in synchronization with the packaging operation, the pair of heat-sealing rods are attracted to each other to sandwich both edges of the packaging material in a palm-like shape, and the both heat-sealing rods are moved downward while performing heat sealing to pull down the packaging material. The packaging material is stopped until the heat-sealing rod returns to the upper position for the next packaging, at which time lateral heat-sealing is performed. The vertical seal device that makes the vertical heat seal perform box motion has a structure in which the vertical heat seal makes a predetermined movement from a drive source such as a floor-standing motor via a transmission mechanism, so that the number of parts is large and it is very complicated and large. It has become.

As a vertical sealing device, the applicant has devised a structure that operates similar to a box motion that can increase the packaging speed while ensuring sufficient sealing time, and has created a simple and compact bag-making filling and packaging machine. It has been proposed (Patent Document 2, Patent Document 3). In this vertical sealing device, the continuous rotation of the drive motor is combined with the operation of the vertical heat sealing device along the moving direction of the packaging material and the operation of the packaging material in the contacting / separating direction with respect to the side edge portion in the vertical direction. It is equipped with a motion conversion mechanism that converts it into an oblong motion with a long axis. This oblong motion is similar to the box motion that is often used as a horizontal sealing mechanism, and a part of the oblong motion is used as a crimping stroke / crimping white to the side edge portion of the packaging material. A long crimping distance and crimping period are secured.

By the way, at the operation site of a bag-making filling / packaging machine, it may be necessary to cope with a packaging size (particularly a bag length) that is suddenly changed beyond the specifications initially assumed. When a servomotor is used as the drive source of the box motion in the vertical sealing device configured in the box motion structure, the bag length should be adjusted to be shorter by controlling the operation timing of the servomotor. However, in order to respond to specification changes that increase the bag length, which cannot be handled by adjusting the drive system, the vertical seal bar is machined with a stroke that moves in the feed direction of the packaging material during box motion. Need to be changed. However, if the stroke of such a vertical sealing device is changed, the components of the box motion structure must usually be replaced. As mentioned above, when the box motion structure is very complicated and large, and the number of component parts is large or the assembly is complicated, the replacement work becomes very large and takes a long time. There is. Therefore, the restart of the operation of the bag-making filling and packaging machine will be delayed, and it may not be possible to immediately procure the components of the vertical sealing mechanism corresponding to the required size in the first place. It can be impossible.

Special Publication No. 44-24359 Japanese Patent No. 5161669 Japanese Patent No. 5260071

Therefore, it is used in a bag-making filling and packaging machine that continuously manufactures a bag-packaging body in which a product is put into the bag formed in advance while forming a bag by horizontally sealing the tubular packaging material. A vertical sealing device provided with a vertical sealing member that vertically seals the side edge portion of the strip-shaped packaging material while moving in the feeding direction of the strip-shaped packaging material in order to mold the strip-shaped packaging material into the tubular packaging material. However, when the vertical seal device is provided with a drive motor and a mechanical transmission mechanism that converts the rotational output thereof into a seal stroke of the vertical seal member, the transmission mechanism can be devised to be a component. There is a problem to be solved in that the stroke of the vertical sealing member along the feeding direction of the packaging material can be changed without increasing the number of points.

An object of the present invention is to solve the above problems, and to cope with a change in bag size exceeding the specifications initially assumed, the structure is simple and the stroke can be easily changed without increasing the number of parts. It is to provide a vertical sealing device in a vertical bag-making filling and packaging machine.

In order to solve the above problems, the vertical sealing device in the vertical bag-making filling and packaging machine according to the present invention is a product in the bag formed in advance while forming a bag by applying a horizontal seal to a tubular packaging material. It is used in a bag-making filling and packaging machine that continuously manufactures a bag-packaging body in which It is a vertical sealing device provided with a vertical sealing member that vertically seals the side edge portion of the strip-shaped packaging material.
The vertical seal device includes a drive motor and a mechanical transmission mechanism that converts the rotational output thereof into a seal stroke of the vertical seal member.
By changing the mounting position of the part products actually you are using in the transmission mechanism, it is characterized in that to change the sealing stroke length of the longitudinal seal.

According to the vertical sealing device in this vertical bag-making filling and packaging machine, the rotational output of the drive motor is changed to the sealing stroke of the vertical sealing member via a mechanical transmission mechanism, which is actually used in the transmission mechanism. by changing the mounting position of that part article, sealing the stroke length of the longitudinal sealing member in which the parts providing is changed in posture after the change and before the orientation change. Thus, the sealing stroke length of the longitudinal sealing member which moves together with just the packaging while applying longitudinal seal packaging materials to change the mounting position of the component in the feeding direction is changed, it can not be handled by adjusting the drive system It is possible to respond to changes in the bag size (bag length) that exceed the initially expected specifications without increasing the number of parts.

In the vertical sealing device in this vertical bag-making filling and packaging machine, the transmission mechanism supports a motor shaft from which the rotational output of the driving motor is output and two vertical sealing blocks as the vertical sealing member, and a slide shaft. A crank mechanism that connects a vertical sealer base that is slid and guided in the vertical direction by a crank on the motor shaft side and a connecting rod on the vertical sealer base side. Ru connecting pin der used as the connecting portion.
By changing the mounting posture of the connecting pin used as the connecting rod between the first crank on the motor shaft side and the connecting rod on the vertical sealer base side, the length of the crank on the motor shaft side, that is, the motor shaft is the sealer base. The diameter of swinging the connecting rod on the side is changed, and as a result, the seal stroke length of the vertical sealer base and the vertical sealing member supported by the vertical sealer base is changed.

In the vertical sealing device in this vertical bag-making filling and packaging machine, the two vertical sealing blocks are supported by the vertical sealer base so as to be openable and closable in the horizontal direction, and the sliding guide is provided by the slide shaft of the vertical sealer base. By combining the vertical stroke operation and the opening / closing operation of the two vertical seal blocks on the vertical sealer base, a box motion including a seal stroke that moves in the vertical direction while applying the vertical seal to the strip-shaped packaging material is performed. can do.
In the vertical sealing device, the two vertical sealing blocks are closed and the sealer base moves downward in the vertical direction while sandwiching both side edge portions of the strip-shaped packaging material to apply vertical sealing to both side edge portions of the strip-shaped packaging material. The two vertical seal blocks are opened and the sealer base moves up while away from the vertical seal, so that the two vertical seal blocks return to their original positions in a box motion.

In the vertical sealing device in this vertical bag-making filling and packaging machine, the connecting pin has a fitting portion having a point-symmetrical deformed outer shape, a structure integrated with the fitting portion, and offset from the center of the fitting portion. It has a round shaft portion having an axis at a position, and the fitting portion is attached to the crank by being fitted into a deformed hole formed in the crank in a shape complementary to the deformed outer shape. the round shaft portion is rotatably attached to the connecting rod.
The fitting portion of the connecting pin has a point-symmetrical deformed outer shape, and the crank has a deformed hole having a shape complementary to the deformed outer shape of the fitting portion of the connecting pin. Even when the mounting posture is changed by fitting the fitting portion rotated 180 degrees and the deformed hole and mounted on the crank, the fitting portion can be fitted and mounted in the deformed hole. At this time, since the round shaft portion has an axis line at a position offset from the center of the fitting portion, the length of the crank is changed when the connecting pin is attached to the crank by changing its attachment posture. Therefore, the seal stroke length of the vertical seal member can be changed according to the offset length.

In the vertical sealing device in this vertical bag-making filling and packaging machine, the deformed outer shape and the deformed hole of the fitting portion have two surfaces parallel to the length direction of the crank, and the round shaft. part of the axis offset can be assumed to be positioned in plane perpendicular to the central street and the two surfaces of the fitting portion.
In this case, when the connecting pin is attached to the crank in a posture rotated by 180 degrees, the offset direction of the round shaft portion is along the direction of the length of the crank. There is no mistake because the structure of the connecting pin is simple, and the mounting posture of the connecting pin can be changed and the mounting work after the posture change is easy.

In the vertical sealing device in this vertical bag-making filling and packaging machine, a second connecting pin having the same structure as the connecting pin can be used as a connecting portion between the vertical sealer base and the connecting rod. In this case, the connecting portion does not change the seal stroke length in which the vertical sealing member applies the vertical sealing to the packaging material when the crank mechanism operates, but the vertical sealing member moves together with the packaging material in the feeding direction. Since the range of the seal stroke to be applied can be shifted, for example, the position of the range (range) for applying the vertical seal to the horizontal seal position on the packaging material can be adjusted.

Since the vertical sealing device in the vertical bag-making filling and packaging machine according to the present invention is configured as described above, the rotational output of the drive motor is changed to the sealing stroke of the vertical sealing member via the mechanical transmission mechanism. In the above, the parts currently used in the transmission mechanism, that is, the fitting part of the connecting pin used as the connecting part between the crank on the motor shaft side and the connecting rod on the vertical sealer base side, and the fitting of the deformed hole. by attaching to change the mounting position by engagement, sealing the stroke length of the longitudinal sealing member is changed based on the change of its attitude. Therefore, the stroke length of the vertical sealing member that applies the vertical seal to the side edge portion of the strip-shaped packaging material while moving in the feeding direction together with the strip-shaped packaging material is changed. It is possible to respond to sudden changes in the bag length that exceed the assumed specifications, especially changes that make the bag length longer. That is, since all that is required to change the stroke is mounting by changing the mounting posture of the connecting pin , which is a component currently used, the structure of the transmission mechanism is not complicated and the number of components is increased. It is possible to respond to a sudden request for a change in bag size without having to do so.

FIG. 1 is a front view showing an embodiment of a vertical sealing device in a vertical bag-making filling / packaging machine according to the present invention. FIG. 2 is an enlarged front view showing a part of the vertical sealing device shown in FIG. FIG. 3 is a diagram showing the structure of the connecting pin shown in FIG. FIG. 4 is a diagram illustrating a change in the seal stroke of the vertical seal device in the vertical bag-making filling and packaging machine according to the present invention. FIG. 5 is a perspective view showing an example of a conventional vertical bag-making filling / packaging machine.

Hereinafter, examples of the vertical sealing device in the vertical bag-making filling and packaging machine according to the present invention will be described with reference to the attached drawings. FIG. 1 is a front view showing an embodiment of a vertical sealing device in a vertical bag-making filling / packaging machine according to the present invention.

The vertical sealing device in the vertical bag-making filling and packaging machine shown in FIG. 1 can be applied to a conventionally known vertical bag-making filling and packaging machine as shown in FIG. Therefore, the vertical bag-making filling and packaging machine itself to which the vertical sealing device is applied will not be described again here. The vertical sealing device 1 shown in FIG. 1 includes a frame 2 of the packaging machine and slide shafts 3 and 3 for slidingly guiding the vertical sealer base 6 as fixing members.

The vertical seal device 1 includes a servomotor 4 which is a drive source attached to the frame 2, a crank mechanism 5 as a mechanical transmission mechanism for converting the rotational output of the servomotor 4 into a reciprocating motion in the vertical direction, and a crank mechanism. Both end edges of a strip-shaped packaging material Fw supported by a vertical sealer base 6 connected to 5 and a band-shaped packaging material Fw that is supported by the vertical sealer base 6 and moves in the vertical direction along the slide shafts 3 and 3 together with the vertical sealer base 6. The vertical seal blocks 7 and 7 for vertically sealing the partial fe and fe are provided. The vertical seal is usually preferably performed by forming the vertical seal blocks 7 and 7 into a heat seal block and performing the heat seal, but the vertical seal is not limited to this.

The crank mechanism 5 includes a crank 9 having a motor shaft 8 which is a rotation output shaft of a servomotor 4 attached to one end, a first connecting pin 10 attached to the other end of the crank 9, and a first connecting pin 10. It includes a connecting rod 11 attached to one end and a second connecting pin 12 attached to the other end of the connecting rod 11 and also attached to the vertical sealer base 6. The first connecting pin 10 is rotatably connected to the connecting rod 11. Further, the second connecting pin 12 is axially rotatably connected to the connecting rod 11 or the vertical sealer base 6.

In the crank mechanism 5, when the motor shaft 8 rotates as the rotational output of the servomotor 4, the crank 9 rotates together with the motor shaft 8 around the motor shaft 8. Since the crank 9 and the connecting rod 11 are connected to each other by the first connecting pin 10, and the position of the second connecting pin 12 is constrained by the vertical sealer base 6, the crank 9 and the connecting rod 11 are connected to each other. The so-called crank movement is performed. By this crank motion, the vertical sealer base 6 makes a stroke operation reciprocating in the vertical direction (vertical direction; feeding direction of the packaging material) while being slidably guided in the longitudinal direction by the slide shafts 3 and 3. In this way, the rotational output of the servomotor 4 is converted into an ascending / descending stroke operation of the vertical sealer base 5 that supports the vertical seal blocks 7 and 7 by the crank mechanism 5.

The vertical sealer base 6 supports the vertical seal blocks 7 and 7 so as to move together in the vertical direction (feeding direction of the packaging material), but can open and close each other in the horizontal direction (direction intersecting the packaging material). It is a supporting base member. Although not shown, the vertical sealer base 6 is provided with a mechanism for opening and closing the vertical seal blocks 7 and 7 in the horizontal direction. The opening / closing mechanism for the vertical seal blocks 7 and 7 may be a mechanism having a drive source such as a servomotor, or a mechanical mechanism for causing lateral movement related to vertical movement. ..

The vertical seal blocks 7 and 7 are closed to sandwich the both side edge portions fe and fe of the strip-shaped packaging material Fw that is curved in a substantially tubular shape, and the vertical sealer base 5 makes a downward stroke operation in that state. With the vertical seal blocks 7 and 7 sandwiching the both side edge portions fe and fe, the box motion descending stroke operation is performed while synchronizing with the feed of the packaging material, and the both side edge portions fe and fe are heat-sealed. As a result, a vertical seal Sc is formed. When the vertical seal blocks 7 and 7 are open, both side edge portions fe and fe of the vertical seal Sc or the strip-shaped packaging material Fw can pass through the gap G. As the vertical sealer base 5 rises, the vertical seal blocks 7 and 7 perform a box motion ascending stroke operation in the open state, and return to a position for preparing for the next vertical heat seal.

FIG. 2 is an enlarged front view showing a part of the vertical sealing device shown in FIG. As shown in FIG. 2, the motor shaft 8 is fitted into a round shaft hole 14 formed in one end portion 13 of the crank 9, and reaches the round shaft hole 14 via the key 15 and from the outside. By tightening the slit 16 with the bolt 17 in the closing direction, the motor shaft 8 is firmly coupled to the one end portion 13 of the crank 9 in the round shaft hole 14 so as not to rotate relative to each other.

As shown in FIG. 2, the other end 18 of the crank 9 is formed with a deformed hole 19 having a non-circular hole shape when viewed in a cross section formed by a plane orthogonal to the axis of the motor shaft 8. A slit 20 is formed from the outside to the deformed hole 19 as in the case of the one end portion 13. The pin shape of the first connecting pin 10 and the hole shape of the deformed hole 19 are complementary to each other, and the first connecting pin 10 is fitted and mounted in the deformed hole 19. The pin shape of the first connecting pin 10 and the fitted state of the deformed hole 19 are essentially non-rotatable due to the deformed shape, and by tightening with a bolt 21 at the other end 18, the first connecting pin 10 and the deformed hole 19 are deformed. The gap between the 19 and the 19 is crushed, and the first connecting pin 10 (details will be described later) fitted in the deformed hole 19 is firmly coupled to the other end 18 of the crank 9.

FIG. 3 is a diagram showing the structure of the first connecting pin shown in FIG. 3 (a) and 3 (c) are end views when viewed in the axial direction of the first connecting pin, and FIGS. 3 (b) and 3 (d) are shown in FIGS. 3 (a) and 3 (c), respectively. It is a side view of the 1st connecting pin. As shown in FIG. 3, the first connecting pin 10 includes a deformed fitting portion 22 and a round shaft portion 23 having a circular cross section that is integrated with the fitting portion 22. The fitting portion 22, which has a shape complementary to the deformed hole 19, has parallel planes 24 and 24 facing inward and outward along the longitudinal direction of the crank 9 and lateral directions orthogonal to the longitudinal direction of the crank 9. It consists of 25,25 mirror-symmetrical curved surfaces (part of a cylindrical surface) facing. In the case of the deformed hole 19, the flat surface and the curved surface are opposite to each other. As shown in FIGS. 3A and 3C, the outer shape of the fitting portion 22 is a point-symmetrical deformed (other than circular) outer shape when viewed from the end face orthogonal to the axis of the first connecting pin 10. Have. Regarding the fitting portion 22, as seen in the end face drawings (a) and (c), a symmetric axis in which the planes 24 and 24 are line-symmetric and a mirror-symmetric curved surface (a part of the cylindrical surface) 25 and 25 are lines. The intersection with the symmetrical axis is the point of symmetry of the irregular outer shape that is point-symmetrical. Since the outer shape of the fitting portion 22 is point-symmetrical, the outer shape and posture relative to the deformed hole 19 do not change even if the fitting portion 22 is rotated 180 degrees around the axis of the first connecting pin 10. It can be fitted as it is in the deformed hole 19.

The round shaft portion 23 of the first connecting pin 10 is not formed so as to be centered on the fitting portion 22. That is, the axis center 26 of the round shaft portion 23 is located at a position close to one plane 24 but far from the other plane 24 with respect to the planes 24 and 24. However, the axis center 26 of the round shaft portion 23 is on the left-right center symmetry line for the curved surfaces 25 and 25 which are arranged and shown on the left and right in FIGS. 3 (a) and 3 (c).

By providing the above structure, the first connecting pin 10 has two postures changed by rotating the deformed hole 19 by 180 degrees (that is, the postures shown in FIGS. 3A and 3B). Any of the postures shown in FIGS. 3C and 3D) can be fitted and attached. In these two mounting postures of the first connecting pin 10, the shaft center 26 of the round shaft portion 23 is deviated by the distance ΔL shown in FIG. 3 when viewed in the longitudinal direction of the crank 9. As a result, the position of the round shaft portion 23 on the crank 9 occupies a position where the distance from the motor shaft 8 differs by ΔL. As described above, according to the vertical sealing device 1, the length of the crank 9 (from the axial position of the motor shaft 8 to the round shaft portion 23) is simply changed by changing the mounting posture of the first connecting pin 10 to the crank 9. The runout diameter to the axis position) can be changed. At this time, since the parts of the first connecting pin 10 are not replaced, it is possible to avoid an increase in the number of parts.

FIG. 4 is a diagram illustrating a change in the seal stroke of the vertical seal device in the vertical bag-making filling and packaging machine according to the present invention. In the illustrated example in FIG. 4, the motor shaft 8 is shown as continuously rotating. Therefore, for the crank 9, the state at the top dead center position on the solid line is shown by the solid line, and the state at the bottom dead center position is shown by the imaginary line. Further, the connecting rod 11 is shown by a solid line when the crank 9 is in the top dead center position and the bottom dead center position, but the first connecting pin 10 is attached in a state close to the motor shaft 8. The state of the crank is shown by a solid line, and the state of being mounted far from the motor shaft 8 is shown by an imaginary line. As shown in the figure, regarding the movement range (seal stroke length) of the second connecting pin 12, the first connecting pin 10 is longer when the first connecting pin 10 is mounted far from the motor shaft 8. Since it swings around with the diameter, the crank length Lc'in that case is wider by ΔL at both the upper and lower limits than the crank length Lc when it is installed in a close state. Therefore, the stroke of the vertical sealer base 6 (seal stroke length L'(= 2 × Lc') of the vertical seal blocks 7 and 7) is the original stroke (original seal stroke length L of the vertical seal blocks 7 and 7). (= 2 × Lc)), which is 2ΔL longer, and can be used when an unexpectedly long size bag is required.

Regarding the vertical sealing device 1 of the above embodiment, an example in which the first connecting pin 10 is particularly devised as a connecting portion with the crank 9 has been described, but the structure of the first connecting pin 10 is connected to the crank 9. When applied to the rod 11 in an interchangeable manner, that is, the fitting portion 22 is fitted into the deformed hole 19 formed in the connecting rod 11, and the round shaft portion 23 is fitted into the round shaft hole 14 of the crank 9. In this case, the seal stroke length does not change, but the seal stroke range can be shifted in the vertical direction. Further, instead of the structure applied to the first connecting pin 10, the same structure can be applied to the second connecting pin 12. In this case as well, the length of the arm of the crank 9 does not change unless the length is changed as the selected length, but the vertical sealer base 6 can be changed by changing the mounting posture of the second connecting pin 12. Since the range in which the material reciprocates up and down is shifted as a whole, the seal stroke range can be shifted in the vertical direction. be able to.

As for the first connecting pin 10 or the second connecting pin 12, several lengths can be prepared as the offset distance ΔL. Although it is necessary to replace parts (stroke width), it is possible to select not only two types of seal stroke lengths but also a large number of seal stroke lengths such as four types and six types to support a wide stroke range. Can be done.

1 Vertical seal device 1 2 Frame 2 3, 3 Slide shaft 4 Servo motor 5 Crank mechanism 6 Vertical sealer base 7, 7 Vertical seal block 8 Motor shaft 9 Crank 10 1st connecting pin 11 Connecting rod 12 2nd connecting pin 13 Crank One end 14 Round shaft hole 15 Key 16 Slit 17 Bolt 18 Crank other end 19 Deformed hole 20 Bolt 21 Slit 22 Fitting part 23 Round shaft part 24, 24 Flat surface 25, 25 Curved surface 26 Shaft center Fw of round shaft part 21 Band-shaped packaging material fe, fe Both side edge parts Sc Vertical seal Se Horizontal seal L, L'Seal stroke length Lc, Lc' Crank length ΔL Distance (offset length)

Claims (4)

It is used in a bag-making filling and packaging machine that continuously manufactures a bag-packaging body in which a product is put into the bag formed in advance while forming a bag by applying a horizontal seal to a tubular packaging material. A vertical sealing device provided with a vertical sealing member that vertically seals a side edge portion of the strip-shaped packaging material while moving in the feeding direction of the strip-shaped packaging material in order to mold the strip-shaped packaging material into the tubular packaging material. hand,
The vertical seal device includes a drive motor and a mechanical transmission mechanism that converts the rotational output thereof into a seal stroke of the vertical seal member.
The transmission mechanism includes a motor shaft from which the rotational output of the drive motor is output, and a vertical sealer base that supports two vertical seal blocks as the vertical seal member and is vertically slid and guided by a slide shaft. , A crank mechanism that connects the crank on the motor shaft side and the connecting rod on the vertical sealer base side.
In the transmission mechanism, a connecting pin is actually used as a connecting portion between the crank and the connecting rod, and the connecting pin has a fitting portion having a point-symmetrical deformed outer shape and an integral structure with the fitting portion. It has a round shaft portion having an axis at a position offset from the center of the fitting portion, and has a round shaft portion.
The fitting portion is attached to the crank by being fitted into the deformed hole formed in the crank in a shape complementary to the deformed outer shape, and the round shaft portion is rotatable on the connecting rod. Is attached to
A vertical bag-making filling and packaging machine characterized in that the seal stroke length of the vertical sealing member is changed by changing the mounting posture by fitting the fitting portion of the connecting pin and the deformed hole. Vertical sealing device in. The two vertical seal blocks are supported by the vertical sealer base so as to be openable and closable in the horizontal direction, and the vertical stroke operation of being slid-guided by the slide shaft of the vertical sealer base and the vertical stroke operation of the vertical sealer base and the said The vertical type according to claim 1 , wherein a box motion including a seal stroke that moves in the vertical direction is performed while applying the vertical seal to the strip-shaped packaging material by combining the opening and closing operations of the two vertical seal blocks. Vertical sealing device in bag making, filling and packaging machines. The profiled contour and said profiled bore of said fitting portion, said has a length direction parallel to the two surfaces in the crank, the axis which is offset of the round shaft portion, the said fitting portion The vertical sealing device in the vertical bag-making filling / packaging machine according to claim 1 or 2 , wherein the vertical sealing device passes through the center and is located in a plane orthogonal to the two planes. The vertical bag making according to any one of claims 1 to 3, wherein a second connecting pin having the same structure as the connecting pin is used as a connecting portion between the vertical sealer base and the connecting rod. Vertical sealing device in filling and packaging machines.

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